Fixed unity fixture for ESP32/S2

* Created compile switch for UNITY_MAIN
  since it was using exit() syscall leading to
  abort() on ESP

tools/unit-test-app/components/test_utils/test_runner.c

@@ -18,6 +18,7 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "unity.h"
+#include "unity_test_runner.h"
 #include "test_utils.h"
 #include "esp_newlib.h"